The New USDA: Cultivating Change

The New USDA: Cultivating Change

USDA - ARS Global Change Research on Rangelands and

Rangelands T he topic of global change is found almost daily in newspaper and magazine articles and on television. Global change refers to large-scale changes in the Earth’s biological, geological, hydrological, and atmospheric systems, whether of human or natural origin. The primary concern of global change has centered on the rapid increase in atmospheric concentrations of primary greenhouse ...

Cultivating the uncultured.

The recent application of molecular phylogeny to environmental samples has resulted in the discovery of an abundance of unique and previously unrecognized microorganisms. The vast majority of this microbial diversity has proved refractory to cultivation. Here, we describe a universal method that provides access to this immense reservoir of untapped microbial diversity. This technique combines e...

Cultivating the Agent Economy

Advances in eletronic commerce and agent technology are pushing the world rapidly toward ever-increasing ebusiness automation. The logical development of this movement is agent-based electronic commerce, in which software agents act as autonomous (or semi-autonomous) businesses in their own right, buying and selling information goods and services online. We review some of the forseeable develop...

A new defined medium for cultivating Leishmania promastigotes.

A chemically defined medium to grow the promastigotes of 19 stocks of Leishmania is described. The medium was developed by making qualitative and quantitative modifications of the medium AR-103 devised for Trypanosoma cruzi. The new medium, designated as MD-29, can be used in studies on the nutritional requirements of promastigotes.